Updated at 5:52 p.m. ET: Actor Dick Van Dyke has been forced to cancel an upcoming public appearance due to a suspected neurological problem.
The 87-year-old star was set to receive the Lifetime Achievement Award for Bettering Humanity through Comedy from New York's 92Y on April 26, but a rep for Van Dyke told Entertainment Tonight that he wouldn't be able to make it due to "fatigue and lack of sleep resulting from symptoms of a yet-to-be diagnosed neurological disorder.”
92Y confirmed the cancellation in a statement to the New York Post.
"Due to a medical condition, Mr. Van Dyke is unable to travel to New York for the program,” the statement read.
There could be more cancellations in the future for the film and television legend. According to his rep, he's currently unable to attend any events requiring air travel.
"This is a guy that never gets sick. ... He doesn't smoke, drink or pop pills," Bob Palmer, Van Dyke's publicist, told NBC News. "Its very frustrating that doctors cannot find out what is going on."
But Van Dyke isn't leaving all of the comments about his condition to his rep. He's looking for answers about his health and reaching out to fans on Twitter for help.
"My head bangs every time I lay down. I've had every test come back that I'm perfectly healthy. Anybody got any ideas?" he wrote on Wednesday.
He later explained that the problem has been going on for seven years and that he's had "every test you can think of (CAT Scan, MRI, Spinal tap etc)," and that he also has "very low blood pressure."
While he's received plenty of feedback from fans, for now his ailment remains a mystery.
This story was originally published on Thu Apr 18, 2013 10:30 AM EDT